A new study from the Harvard School of Public Health followed more than 120,000 people over the course of as many as 20 years, to see what they ate and how it affected their weight. Some of the findings are surprising, including these: Nuts and yogurt were most closely correlated with weight loss. And potatoes of any kind caused the most weight gain. Michele Norris talks with one of the authors of the study, Walter Willett from the Harvard School of Public Health.
Trying To Lose Weight? Study May Have Some Pointers
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